مقاله انگلیسی رایگان در مورد خود ترمیمی مبتنی بر میکروب در بتن با مقاومت بالا – اسپرینگر ۲۰۲۴

مقاله انگلیسی رایگان در مورد خود ترمیمی مبتنی بر میکروب در بتن با مقاومت بالا – اسپرینگر ۲۰۲۴

 

مشخصات مقاله
ترجمه عنوان مقاله افزایش انعطاف پذیری سازه: خود ترمیمی مبتنی بر میکروب در بتن با مقاومت بالا
عنوان انگلیسی مقاله Enhancing Structural Resilience: Microbial-Based Self-Healing in High-Strength Concrete
نشریه اسپرینگر
سال انتشار ۲۰۲۴
تعداد صفحات مقاله انگلیسی  ۱۷ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
نوع نگارش مقاله
مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) Scopus – Master Journal List – JCR – DOAJ
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF)
۳٫۹۴۱ در سال ۲۰۲۲
شاخص H_index ۴۷ در سال ۲۰۲۴
شاخص SJR ۱٫۰۶۱ در سال ۲۰۲۲
شناسه ISSN ۲۲۳۴-۱۳۱۵
شاخص Quartile (چارک) Q1 در سال ۲۰۲۲
فرضیه ندارد
مدل مفهومی ندارد
پرسشنامه ندارد
متغیر ندارد
رفرنس دارد
رشته های مرتبط مهندسی عمران
گرایش های مرتبط سازه – مدیریت ساخت – ساختمان های بتنی
نوع ارائه مقاله
ژورنال
مجله / کنفرانس مجله بین المللی سازه ها و مصالح بتنی – International Journal of Concrete Structures and Materials
دانشگاه Department of Civil Engineering, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
کلمات کلیدی باسیلوس فکسوس – مقاومت فشاری – دوام بتن – بتن با مقاومت بالا – خود ترمیم میکروبی – Sporosarcina koreensis
کلمات کلیدی انگلیسی Bacillus fexus – Compressive strength – Concrete durability – High-strength concrete – Microbial self-healing – Sporosarcina koreensis
شناسه دیجیتال – doi
https://doi.org/10.1186/s40069-024-00661-4
لینک سایت مرجع
https://link.springer.com/article/10.1186/s40069-024-00661-4
کد محصول e17783
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
Introduction
Methodology
Results and Discussions
Conclusions
Recommendations for Future Study
Availability of data and materials
References

 

بخشی از متن مقاله:

Abstract

Concrete’s weak tensile strength renders it susceptible to cracking under prolonged loads, leading to reduced load-bearing capacity and reinforcing bar corrosion. This study investigates the effectiveness of microbial-based self-healing in high-strength concrete, focusing on two bacterial strains: Sporosarcina koreensis and Bacillus. Results demonstrate significant enhancements in micro- and macro-physical properties of high-strength bacterial concrete with Bacillus flexus and S. koreensis, surpassing the control. Bacillus flexus-infused concrete exhibits a remarkable 21.8% increase in compressive strength at 7 days and 11.7% at 56 days. Similarly, S. koreensis-treated concrete shows 12.2% and 7.4% increases at 7 and 56 days, respectively. Enhanced crack healing occurs due to calcite precipitation, confirmed by X-ray diffraction and scanning electron microscopy. Both bacterial strains achieve crack closure within 42 days, with widths of 259.7 µm and 288.7 µm, respectively. Moreover, bacterial concrete from these strains excels in durability against water, acid, and salt exposure, surpassing control concrete. These findings emphasize microbial-based self-healing’s potential in high-strength concrete, providing a practical strategy to enhance structural resilience and extend concrete infrastructure lifespan.

Introduction

High-strength concrete (HSC) has gained widespread recognition for its enhanced mechanical properties, making it suitable for demanding structural applications (Krishnapriya et al., 2015). However, like conventional concrete, HSC is susceptible to cracking under various stress conditions, which can compromise its durability and load-bearing capacity (Iheanyichukwu et al., 2018). The resulting cracks not only diminish load-bearing capacity but also trigger environmental and economic issues, including carbon emissions during repair (Rosewitz et al., 2021). Additional weakness of concrete structure is the presence of voids and fissures in its body matrix. The circumstance of such voids in the matrix of concrete plays substantial role in determining its mechanical properties and durability (Feng et al., 2021; Khaliq & Ehsan, 2016).

The concept of self-healing concrete, facilitated by microbial activity, has emerged as a promising avenue to address these challenges, aiming to autonomously fill and repair such voids and cracks via bio-mineralization. In this process, bacteria induce the conversion of calcium particles within the cement composite into calcium carbonate, calcite. Precipitation and deposition of calcite due to microbial activity of bacteria seals such voids and fissures in the concrete body matrix. This in turn advances the mechanical properties and durability of concrete as well as healing rate of crack formed due variously initiated stress (Rohini & Padmapriya, 2021; Singh & Gupta, 2020). These bacteria must exhibit robust urease activity, withstand high pH levels, and endure mechanical stress within the concrete matrix (Rohini & Padmapriya, 2021; Rosewitz et al., 2021).

Conclusions

This study investigated the impact of microbes on high-strength concrete properties, utilizing B. flexus and S. koreensis. The research encompassed their effect on mechanical strengths (compressive, flexural), ultrasonic pulse velocity, acid and salt resistance, and microbial healing. Key findings are presented as follows:

High-strength bacterial concrete, employing B. flexus and S. koreensis, exhibited improved macro-physical properties compared to conventional concrete. B. flexus concrete showed 21.8% and 11.7% higher compressive strength at 7 and 56 days, while S. koreensis concrete exhibited 12.2% and 7.4% increases. Flexural strength for B. flexus concrete was 6.0% and 9.0% higher at 14 and 28 days, and for S. koreensis concrete, it increased by 5.2% and 6.4%.

Microbial-induced calcite deposition significantly enhanced the healing capacity of cracked bacterial concrete. Within 42 days, B. flexus and S. koreensis concrete restored cracked sections by 259.7 µm and 288.7 µm crack widths, respectively.

Bacterial concrete exhibited greater strength restoration following 55% stress-level crack initiation. While normal concrete regained only 64.0% of its 28-day compressive strength, B. flexus and S. koreensis concrete achieved 96.1% and 94.1% restoration, respectively.

Enhanced durability against acid and salt attacks was observed in bacterial concrete, with reduced weight and strength loss compared to conventional concrete. B. flexus and S. koreensis concrete experienced lower strength losses (4.8% and 5.3% for sulfuric acid, 1.8% and 2.1% for magnesium sulfate) than conventional concrete.

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